A Light Ray in Air Strikes a Glass Plate Whose

question 83

Multiple Choice

A light ray in air strikes a glass plate whose index of refraction is 1.42.Some of the light reflects off the surface of the plate,but most of it enters the glass.If the angle of refraction is one-half the angle of reflection,the angle of refraction is closest to which one of the following angles?

• A)45°
• B)43°
• C)41°
• D)39°
• E)37°

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Definitions:

Sinoatrial Node

The heart's natural pacemaker, a group of cells located in the right atrium that regulate the heartbeat by generating electrical impulses.

Pacemaker

The SA node of the heart; also refers to an artificial device that initiates heartbeat.

High Risk

Situations, activities, or individuals associated with a significantly increased likelihood of adverse outcomes or danger.

Heart Disease

A range of conditions affecting the heart, including coronary artery disease, heart rhythm problems (arrhythmias), and many others.